When all eyes are on you come Christmas morning and the gift you open is rubbish, you go into amateur actor mode.

You try to grin and fail, do your best to look like you love it but ultimately perform a terrible attempt at hiding your true, embarrassed and deflated feelings.

But it turns out the real trick to getting away with pretending to like something you hate is all to do with showing your actual feelings after all.

Confused? So were we...at first.

The Department Of Unwanted Gifts (DOUG) - the body set up to combat Britain's terrible presents epidemic - have enlisted the help of body language expert Judi James to reveal how best to bluff it.

And the surprise revelation is that one of the top techniques is to tell the truth and actually say you hate said item.

But there's a method to this madness, as Judi explains: "This takes a bit of bravery but - when performed well - is the perfect bluff to let your negative emotions out and hide the truth at the same time.

"Your body wants to show complete hatred of the present, so open it and immediately say: ‘I hate it’.

"There will be a pause as everybody takes in what you’ve said before asking ‘Do you?’

"You then let a little grin appear on your face and about turn, saying ‘No, of course not - I love it!’